HR641

Altitude: 56.0° Azimuth: 54.0° Direction: North-East

HR641 is a supergiant star in the constellation of Perseus.

HR641 visual magnitude is 6.44. Because of its reltive faintness, HR641 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR641:

Color of HR641 ⬤

Magnitude of HR641 6.44

Class Supergiant

VISIBILITY RIGHT NOW

HR641 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 56.0°
Azimuth: 54.0°
Direction: North-East

Celestial coordinates and finder chart of HR641

HR641 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR641 are provided in the following table:

Right Ascension J2000 02h 13m 41s

Declination J2000 +58° 33’ 39”

Galactic Longitude 133.5°

Galactic Latitude -2.61°

Constellation Perseus

The simplified sky map below shows the position of HR641 in the sky:

Simplified finder chart for HR641.

Visibility of HR641 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR641 is circumpolar and transits at 21:04 UTC (altitude: 82.9°)

Digitized Sky Survey image of HR641

The image below is a photograph of HR641 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR641 is -0.012 arcsec per year in Right Ascension and 0.02 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR641. The red arrow shows the motion of HR641 during the next 10000 years (-2.00 arcmin in Right Ascension and 3.33 arcmin in declination);

Distance of HR641 from the Sun and relative movement

HR641 is distant 2,884.96 light years from the Sun and it is moving towards the Sun at the speed of 41 kilometers per second.

Distance (parsec) 884.96 pc

Distance (light year) 2,884.96 ly

Heliocentric radial velocity -41 km/s

Proper Motion RA -0.012 arcsec/year

Proper Motion Dec 0.02 arcsec/year

Spectral properties of HR641

HR641 belongs to spectral class A3 and has a luminosity class of I corresponding to a supergiant star.

Absolute magnitude -3.29

Spectral Type A3I

Color Index (B-V) 0.6

Temperature of HR641 5968K

The red dot in the diagram below shows where HR641 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR641. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR641

Henry Draper Catalogue HD13476

SAO Catalogue SAO23044

Hipparcos Catalogue HIP10379

Durchmusterung Catalogue BD+57 519

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In Evidence

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